Stand with an adjustable receptionplate capable of being tipped over in every direction



Apr1l'6, 1948. H. WILD 2,439,194

STAND WITH AN ADJUSTABLE RECEPTION-PLATE CAPABLE OF BEING TIPPED OVER IN EVERY DIRECTION Filed Jan. 18, 1945 Patented Apr. 6, 1943 "UNITED STATE STAND WITH-AN ADJUSTABLE RECEPTION- PLATE CAPABLE OF BEING TIPPED OVER INEVERY DIRECTION Heinrich Wild, Kuttigen, Switzerland, assignor to the firm Kern '& Co. A. G., Aarau, Switzerland Application January 18, 1945, Serial No. 573,4l9 In -Switzerland September 27, 1943 Section 1, Public Law 690, August 8, 19.46 Patent-expires September 27, 1963 4 Claims. (01. 248-481) 1 In order to facilitate the setting up of stands for surveying instruments and similar objects, the reception-plate carrying the instrument, located on the head of thestand, is arranged to be movable on all sides, thus allowing it tofbe perfectly levelled, before the instrument is fixed up. For this purpose, adjustable stand-heads with ball-and-socket joints with a spherical zone, or full spheres, have already been in use. The disadvantage of the stands hitherto used, however, consists therein that the adjustment to be effected is, relatively speaking, not sufficiently precise, besides, the stands cannot be fastened to the extent required. These disadvantages are eliminated by the object of the present invention.

with an adjustable reception-plate capable of being tipped over in every direction, particularly adapted to surveyingand military instruments, whereby the reception-plate carrying the instrument is seated on the surface of a spherical zone on the head of the stand developed as a hollow body, and is provided with a rigid journal penetrating into the head of the stand, a fasteningplate being arranged on this journal beneath the head of the stand, this fastening-plate being seated on a second surface of a spherical zone on the head of the stand, whereby its spherical center coincides with the spherical center of the first mentioned surface of a spherical zone and, for the purpose of pressing the fastening-plate on to the head of the stand, and in order to block the reception-plate, a fixing-screw is attached to its journal.

on which the fastening-plate is seated on the lower part of the head of the stand, is advantageously selected to be greater than the radius of the surface of the spherical zone, on which the reception-plate is positioned. Thereby, Possibilities are offered to effect an easy and precise adjustment of the reception-plate, to block it firmly in every-position.

object of the invention is shown, by way of example, the illustration being an axial section.

body is marked l, three pedestals 2 being attached to it. This head of the stand I is provided, on its upper part, with an adjoined neck 3, its exterior surface being developed as a spherical zone 4, Z being the spherical center, and r the radius.

, l2 plate showing a roll-shaped. edge ,6 atits lower end, in which the appropriate suriaceof aspherical zone corresponding to the spherical. zone 4 is to be provided. Thereception-plate .i is provided, on its lower part, in its center, with a pivot-like, rigid journal I, which penetrates into the head of the stand 1, its adjoined neck 3 showing a break-through 8', and its bottom a break-through 9, and an axially movable fastening-plate lllpositioned outsideof thehead of the stand I is mounted on this journal. This fastening-plate I is seated on a spherical zone ll provided on the lower part of the head of the stand I, its spherical center coinciding with the spherical center Z of the spherical zone 4., The spherical zone II, however, possesses a greater radius R. The fastening of the reception-plate 5, by means of the fastening-plate I0, is efiected by a fixing-screw l2 arranged on a threaded bolt When adjusting, the reception-plate 5, with its journal 1 and the fastening-plate l0 seated thereon, is turned around the common spherical center Z of both spherical zones 4 and II. Inasmuch as the radius R of the spherical zone H is greater than the radius r of the spherical zone 4, on which the reception-plate 5 is seated, an

increased adjustingmovement of the end of the journal 1 of the reception-plate 5, with the fastening-plate I0, is attained and, thereby, possibilities of more precise adjustment in respect to the reception-plate 5 are provided.

1. In a tripod head, the combination of a member comprising a first convexly shaped portion at one end and a secondconvexly shaped portion at the opposite end, said portions having a common spherical cent-er, positioned at a point intermediate to both said portions, said member having a hole extending from one convex portion to the other, a reception member capable of supporting an apparatus of the type described and. comprising a concave lower portion fitted on said first convex portion, an elongated rod rigidly fastened to the reception member, said rod having a diameter smaller than said hole, a plate member supported on said rod and comprising a concave portion fitted on said second convex portion, and clamping means for securing said plate member on the second convex portion in selected variable positions, thereby causing the reception member to be secured in a selected anrelative to the first convex por- The object of the present invention is a stand I3 of the journal I.

I claim:

The radius of the surface of the spherical zone,

In the enclosed sketch, an embodiment of the The head of the stand developed as a hollow gular position On this spherical zone 4 a tion.

reception-plate 5 is positioned, this reception- 2, In a tripod head, the combination of a hollow member comprising a first convexly shaped spherical portion at one end and a second convexly shaped spherical portion at the opposite end, said portions having a common spherical center, positioned at a point intermediate to both said portions, each of said convex portions hav--' ing an opening therein, said openings being aligned with each other and with said spherical center, a reception member capable of supporting an apparatus of the type described and comprising a concave lower portion fitted on said first convex portion, an elongated rod integral with the reception member and. extended through the 4 vex portion, said member having a hole penetrating the member from one convex portion to the other, a reception member capable of supporting an apparatus of the type described and comprising a concave lower portion fitted on said first convex portion, an elongated rod rigidly fastened to the reception member, said rod having a diameters maller than said hole, a plate member 'supportedon said rod and comprising arconcave portion fitted on said second convex portion, andclamping means for securing said openings of the hollow member, said rod having a diameter smaller than said openings, a plate' member supported on said rod and comprising a concave portion fitted on said second convex portion, and, a screw member for pressing said 7 plate member onthe second convex portion in selected variable positions, thereby causing the reception member to be secured in a selected convex positionrelative to the first convex portion.

- 4.-A tripodrhead as described in claim 3,

wherein said clamping means comprises a screw member threaded on said rod for pressing the plate member against the second convex portion.

HEINRICH WILD.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS J Number Name Date 501,510 Hopkins et a1. Ju y1c,1s93 503,319

Ivarson Nov. 7, 1893 

